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Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
Published on: October 25, 2013
La lucha contra las bacterias resistentes a los medicamentos: las pequeñas moléculas imitan la incompatibilidad de
Johna C B Denap1, Jason R Thomas, Dinty J Musk
1Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, IL 61801, USA.
Journal of the American Chemical Society
|November 26, 2004
Resumen
Los investigadores desarrollaron una nueva estrategia para combatir la resistencia a los antibióticos mediante la eliminación de los plásmidos bacterianos. Un compuesto de molécula pequeña, apramicina, elimina efectivamente los plásmidos, resensibilizando a las bacterias a los antibióticos.
Área de la Ciencia:
- Microbiología Microbiología.
- Biología Molecular Biología Molecular
- Descubrimiento de Drogas Descubrimiento de Drogas
Sus antecedentes:
- La resistencia bacteriana a los antibióticos es una creciente amenaza para la salud mundial.
- Los plásmidos portadores de genes de resistencia son uno de los principales contribuyentes a este problema.
- Las estrategias actuales a menudo tienen dificultades para superar la resistencia mediada por plásmidos.
Objetivo del estudio:
- Desarrollar un nuevo método para eliminar los plásmidos resistentes a los antibióticos de las bacterias.
- Para identificar las pequeñas moléculas que pueden inducir la pérdida de plásmido.
- Para volver a sensibilizar las bacterias a los antibióticos convencionales.
Principales métodos:
- Imitando el mecanismo de incompatibilidad de los plásmidos naturales.
- Identificación de la apramicina como un aglutinante del ARN SLI, un elemento regulador clave.
- Utilizando estudios de huellas y mutagénesis para confirmar el sitio de unión.
- Llevar a cabo estudios in vivo para evaluar la eliminación del plásmido y la resensibilización al antibiótico.
Principales resultados:
- La apramicina se une fuertemente al ARN SLI (Kd = 93 nM) en una región reguladora crítica.
- Los estudios han confirmado que la apramicina imita la incompatibilidad plasmática.
- Los experimentos in vivo demostraron una pérdida significativa de plásmidos en las bacterias tratadas con apramicina.
- El tratamiento con apramicina volvió a sensibilizar con éxito a las bacterias a los antibióticos convencionales.
Conclusiones:
- Las moléculas pequeñas pueden imitar efectivamente la incompatibilidad del plásmido para inducir la eliminación del plásmido.
- La apramicina representa una nueva estrategia terapéutica prometedora contra las bacterias resistentes a los antibióticos.
- Este enfoque abre nuevas vías para el desarrollo de fármacos antibacterianos dirigidos a la resistencia mediada por plásmidos.
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